Another recent article by Elizabeth W. Dunn, Lara B. Aknin, and Michael I. Norton, published in 2008 in Science, concluded that money can buy happiness, so long as the money is spent on someone else.
2008年，伊丽莎白·邓恩、劳拉·b·阿克尼和迈克尔·诺顿在《科学》上发表过一项研究结果：只有把钱花在别人身上时，金钱才能买到幸福。
OK, so the claim is if I have a line integral to compute, that it doesn't matter which path I take b as long as it goes from point a to point b.
也就是，如果我需要计算一个线积分，无论我取怎样的路径,只要路径是从点a到点。
OK, so the claim is if I have a line integral to compute, that it doesn't matter which path I take b as long as it goes from point a to point b.
也就是，如果我需要计算一个线积分，无论我取怎样的路径,只要路径是从点a到点。
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